Planibtg-machiwe



UNITED srarns rnNr einen.

`BENJN. BROWN, OF BURLINGTON, VERMONT.

PLANINGr-IVIACI-IINE.

Speccation of Letters Patent No. 4,225, dated October 9, 1845.

To all whom t may concern:

Be it known that I, BENJAMIN BROWN, of Burlington, in the county ofChittenden and State of Vermont, have invented a new and usefulImprovement in Planing-Machines for Planing Lumber; and I do herebydeclare that the following is a full, clear, and eXact descriptionthereof, reference being had to the accompanying drawings, which form apart thereof, in which- Figure l is a. perspective view. Fig. 2 is aside elevation. F ig. 3 is a longitudinal vertical section. Fig. 4 is across section; Fig. 5, a section of the carriage.

The nature of my invention consists in the endless carriage and incombination therewith the adjustable rollers and gate in which thecut-ters are aiiiXed.

The construction is as follows: A suitable frame a, a, is made of castiron or other material. At the sides and posts which are connectedtogether by a sufficient number of wooden braces b, b, on the inside ofeach of the side pieces are guiding ways c, for a purpose hereafterdescribed. A series of castings or metal plates cl are made, as showndetached in Fig. 5, which forms a section of the carriage, on which theboard or other article to be planed rests; through the center of thisplatefrom end to end are apertures made so as to have an open rack e,into which cog-wheels play as will presently appear. Each of the plateshas two strips of wood aiiiXed to its upper side one on each side of therack and covering the rest of the surface of the plate.

The plates move along horizontally guided by the ways c under therevolving cutter at which point they are sustained by ribs m, supportedin and attached to the frame, they slide over these and form a solid bedfor the stuff to be planed on, at each end of the machine the guide waysdescend and form a groove which allows the outer end of the plate todescend about half way down to the position they assume on returning atwhich time the inner end of the plate arrives at the cog wheel (f)situated the distance'of the length of a section plate from the end ofthe machine, and in the guide ways there is a semi-circular branchconcentric with said cog-wheel; this arrangement permits the sectiontorfall and be carried under the cog-wheel, it being kept in gear bysaid guides. At the opposite end a similar arrangement is made for thepurpose of raising the sections by means of another wheel (g), a thirdfeeding cog-wheel g is placed at the center by which the segments aremoved and this is connected with the moving power in any convenient wayso as to adjust the feed. There is a bar (7L) affixed to the frame ateach end that eX- tends t-he whole length thereof directly over theracks above named in the sections and of the same width as the spacebetween the strips of wood that cover the plates into which it fits andforms a level even surface under the plane to support the article to beplaned. Above the center of the bed there is a gallows frame (i) boltedto the frame which stands in an inclined position within which, or onthe upper side of which a frame or gate slides in which the cutter ishung. This cutter is of ordinary construction having three knives in it,but with double instead of single irons in it as are generally used; aguiding roller (7c) is attached to the gate by strong springs on a levelwith the lower line of the circumference of the cutter and in frontthereof. Behind the cut ter where the stuffl to be planed is enteredthere isanother roller (Z) that is kept down upon it with weights (fw)and between which and the bed or carriage t-he stuV1 is held. A shieldplate (m) is put behind the cutter to prevent clogging with chips.

The gate with the cutter can be graduated to any height while themachine is in operation by means of a screw (a) that is attached to thecenter of the gallows, and turns in a nut in the gate which moves it upand down.

It is obvious that there can be two cogwheels, instead of those below gone on each side which will save the necessity of an opening in thecent-er.

Having thus fully described my invention, I wish it to be understoodthat I do not claim an endless platform formed of sections nor do Iclaim the manner of moving them, they having been before used for ahorse-power. But

What I do claim as my improvement and desire to secure by Letters Patentisl. The endless sectional platform or carriage such as heein describedwhich forms bai', for the purpose and in the manner dethe bed forplaniug on 1n combination with scribed. the rotating planing cutters, inthe manner and for the purpose set forth, Whether the BENJAMIN BROVN' 5central bar be used or not. Witnesses:

2. I also claim the sectional platform 01' W. EMERSON,

carriage in combination with the central CHAs. INGALLS.

